Selection of the optimal parameters of a reinforced concrete rectangular beam with single reinforcement

The article is devoted to the problem of choosing the optimal parameters of reinforced concrete rectangular beams with single reinforcement. The analysis of the dependence of the cost of a single-span hinged-supported reinforced concrete beam on the selected parameters of its cross section under the action of a uniformly distributed load. The optimal range of cross-sectional parameters of reinforced concrete articulated beams (height, width, class of concrete and reinforcement, area and reinforcement pitch) was determined depending on the value of the uniformly distributed external load. Strength calculation of reinforced concrete beams is based on the traditional method given in the SR.63.13330.2018 “Concrete and reinforced concrete structures.” The cost of reinforced concrete beams was calculated under the influence of various uniformly distributed loads. The first option, where the width of the beams was constant and the section heights varied between 250 and 1000 mm. The second option, when the heights of the beams were taken equal, and the widths of the beams were in the range from 100 to 500 mm. The recommended height and width of the beam section for the specified value span in the investigated range of loads was set.